Math review

Substitution

100

−4+x−2+y

x=2, y=-3

-7

200

m−4+n−2

m=−1, n=6

-1

300

2*x*y

x=3, y=4

24

400

10n−20

n=5

30

500

7a+9

a=-3

-12

Adding negative numbers

100

-4+10

6

200

8+(-12)

-4

300

-15+15

0

400

-10+(-5)+7

-8

500

9+(-8)+10+(-13)

-2

Subtracting negative numbers

100

5−(−3)

8

200

−8−(−5)

-3

300

3−(−10)

13

400

−20−(−15)

-5

500

-14-(-3)-5

-16

Adding/Subtracting Fractions

100

3/4 +1/4

4/4=1

200

4/5-2/5

2/5

300

5/6-1/8

17/24

400

4/9-1/6

5/18

500

2/5 + 3/10

7/10

Decimals

100

1/2

0.5

200

0.75

3/4

300

1/10

0.1

400

3/10

0.3

500

1/8

0.125